John Wiley & Sons, 1987
Buku Referensi
edited by Avron Barr; Edward A. Feigenbaum
Addison-Wesley, 1982
Buku Teks
Roy F. Baumeister, Kathleen D. Vohs, editors
Sage Publications, 2007
Buku Referensi
Americana Corporation, 1977
Buku Referensi
Americana Corporation, 1964
Buku Referensi